Quantum mechanics

Quark

Catalysis

Self-assembly

Photochemistry

Materials science

Nambu–Jona-Lasinio model

Hexagonal crystal system

Polymer

Physics

Nanotechnology

Organic chemistry

Amphiphile

Chiral symmetry

Copolymer

Circular dichroism

Luminescence

Composite material

Crystallography

Chirality (physics)

Chemistry

Phenylacetylene

Nucleation

Optoelectronics

Angewandte Chemie International Edition

Two-dimensional (2D) chiral materials have been attracting immense attentions owing to their unique properties. Herein, we successfully developed a unique assembly strategy of amphiphilic homopolymers to construct stable free-standing 2D chiral nanosheets in solution. The amphiphilic poly(phenylacetylene) (PPA) homopolymers bearing the hydrophobic and hydrophilic dendritic side chains adopt a DNA-like double-helical conformation. The regular hexagonal nanosheets were formed in THF/EtOH through nucleation and epitaxial growth. The sizes of the nanosheets can be modulated from nanometers to submillimeters upon varying the ratio of binary solvents, while the thickness is linearly correlated with the molecular weights. The 2D architecture can significantly enhance the CPL of polymers with a high dissymmetry factor ≈0.1. Driven by a discrimination of helical conformation, the PPAs can self-sort into homochiral 2D nanosheets, as directly visualized by using fluorescent microscopy.

2D Hexagonal Assemblies of Amphiphilic Double‐Helical Poly(phenylacetylene) Homopolymers with Enhanced Circularly Polarized Luminescence and Chiral Self‐Sorting